Stone-dressing machine



(No Model.) 2 Sheets-Sheet 1.

J. M. MALONE & J. D. PERKINS. STONE DRESSING MACHINE.

No. 566,696. Patented Aug. 25, 1896.

ATTORNEY-8.

(No Muriel.) 2 Sheets-Sheet 2. J. M. MALONE 8: J. D. PERKINS.

STONE DRESSING MACHINE.

Patented Aug. 25, 1896.

INVENTORS WIT VESSES':

ATTORNEYS.

UNITED STATES PATENT rricn.

JAMES M. MALONE AND JAMES D. PERKINS, OF MARBLE HILL, GEORGIA.

STONE-DRESSING MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 566,596, dated August 25, 1896. Application filed November 21, 1895. $erial No. 569,656. (No model.)

To all whom it may concern:

Be it known that we, JAMES M. MALONE and Janus D. PERKINS, of Marble Hill, in the county of Pickens and State of Georgia, have invented a new and Improved Stone-Dressing Machine, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved stone-dressing machine, which is simple and durable in construction, arranged to dress stone for forming columns, and to provide the same with straight or twisted flutes at their peripheral surfaces.

The invention consists of certain parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure l is an end elevation of the improvement. Fig. 2 is a sectional side elevation of part of the same on the line 2 2 of Fig. 1. Fig. 3 is an enlarged side elevation of the ratchet-gear. Fig; 4 is a transverse section of the same. Fig. 5 is aside elevation of the improvement with part in section and arranged for forming spiral flutes. Fig. 6 is a cross-section of the same on the line 6 6 of Fig. 5. Fig. 7 is a similar view of the same on the line 7 '7 of Fig. 5. Fig. 8 isa sectional side elevation of the shifting device, and Figs. 9 and 10 are perspective views of the finished articles.

The improved stone-dressing machine is made in its principal parts in the form of a planer having a frame A, on which is mounted to reciprocate a bed 13, provided with the usual openings for fastening the bearings C and D in place and in longitudinal alinement on said bed. In the bearing 0 is journaled a centering-spindle E, adj ustable in the usual manner by turning a hand-wheel E, said spindle being adapted to engage the center of one end of the stone to be turned and fluted. In the other bearing D is mounted to turn a spindle G, carrying at its inner end a disk G, supporting a spring-pressed longitudinallyextending pin G adapted to engage one of a series of apertures G arranged in a circle on a disk G, fastened in any suitable manner to the inner end of the stone. The latter is adapted to be engaged and planed at its top by a tool H, held in a tool-holder I, transversely-adjustable on a cross-head A adapted to be conveniently adjusted in the standards A of the planer-frame A. (See Fig. 1.) Now, it will be seen that when the bed B is reciprocated the stone is cut by the tool H at the top, and the stone is revolved after every stroke of the tool H, so that finally a complete revolution is made and a 1' ound column F is formed. hen the stone has thus been formed into a column F and it is desired to flute the same, for instance, by forming straight flutes on the peripheral surface of the stone, then the tool H is formed at its cutting end to the shape desired to be given to the flute, as indicated in Fig. 1, the column F being held stationary in its bearings while the bed 13 reciprocates anumber of times and the tool H is fed downward until a flute of desired depth has been made. hen this has been done, the pin G is withdrawn from the corresponding aperture G and the stone is turned by hand until the next aperture G is in register with the pin G and engaged by the latter, to present a new surface for the tool H to form the next straight flute. The disk G is formed with as many apertures G as is desired to form flutes on the peripheral surface of the stone.

In order to turn the column F on the return or non-cutting stroke of the bed B, we provide the spindle G with a worm-wheel J, in mesh with a worm J, secured on a transverselyextending shaft J journaled in suitable bearings on the bed B. On one end of the shaft J is held loosely a pinion K in mesh with a rack K, fitted in longitudinal guideways B, formed on the top of the bed B. The pinion K is connected by apawl L and ratchet-wheel L with the said shaft J (see Figs. 3 and 4,) so that on the forward movement of the bed B the pinion K is revolved by rolling on the rack K, but its rotary motion is not transmitted to the shaft K as the pawl L glides over the teeth of the ratchet-wheel. On the return stroke of the bed B the pinion K is revolved in the opposite direction, and its rotary motion is transmitted by the pawl L and ratchet-wheel L to the shaft J so that the latter is rotated, and by the worm J, in mesh with the worm-wheel J causes a turning of the spindle G, and consequently of the column F, so as to present a new surface to the tool H.

The rack K moves with the bed B only during part of the travel of the latter and is held stationary during part of the stroke, and for this purpose the rack K is provided at one end with a pin K adapted to abut against a stop A projecting from one of the standards A, as is plainly shown in Figs. 1, 2, and 8. The other end of the rack K is formed with a reduced portion K on which is coiled a spring N, resting with its outer end on the bearing 13 for the reduced portion K of the rack. Now, it will be seen that when the bed B moves forward in the direction of the arrow 0, then the rack K remains stationary and moves with the bed for a certain length of time; that is, until the pin K strikes the fixed stop A whereby the rack K is held in position and the pinion K rolls on the rack, as previously explained.

\Vhen it is desired to form spiral flutes on the column F, then the following arrangement is made: On the outer end of the spindle G is secured a shaft 0, formed with a spiral groove 0, engaged by a lug P formed in a nut P, secured to a bracket A projecting from one of the standards A. The length of the spiral groove 0 corresponds to the length of the flute to be formed on the stone, so that when the tool H is on the cutting stroke then the column F is turned to cause the tool to make a spiralcut on the peripheral surface of the column. It is understood that when the bed 13 reciprocates then the fixed lug P, by engaging the spiral groove O, causes a turning of the shaft 0, and consequently of the spindle G, column F, both on the forward and backward stroke of the bed B.

Now, it will be seen that by the machine described a comparatively rough stone can be turned to form a column, and in the peripheral surface of this column can be cut straight or peripheral flutes without removing the stone from the bed.

Having thus fully described our invention, we claim as new and. desire to secure by Letters Patent- 1. Astone-dressing machine, comprising a reciprocating bed, a tool-carrier carrying a tool and held adjustable above the bed, bearings supported on the bed, spindles in said bearings for supporting the stone, a rack held on said reciprocating bed, mechanism operated from the said rack for revolving one of said spindles, and means whereby said rack is held sta- 1 tionary during part of the stroke of the bed. substantially as shown and described.

2. A stone-dressing machine, comprising a reciprocating bed, a transversely and vertically adjustable tool-carrier carrying a tool and held above the bed, bearings held adjustable on the bed, a centering-spindle held in one bearing, a revoluble spindle held in the other bearing, the said spindles being adapted to carry the stone, a rack held on said reciprocating bed, mechanism connected with said revoluble spindle and adapted to be operated by the said rack, and a fixed stop adapted to be engaged by the said rack, whereby the rack is held stationary during part of the stroke of the recipro eating bed, substantially as shown and described.

3. A stone-dressing machine, comprising :1 reciprocating bed, a transversely and vertically adjustable tool-carrier, spindles mounted on bearings supported on said bed for carrying the stone, a feed mechanism for turning said stone intermittently, said feed mechanism comprising a worm-wheel secured on one of the spindles, a worm in mesh with said worm-wheel, a pinion held loosely on a wormshaft, a pawl-and-ratchet mechanism for connecting said pinion to said worm-shaft, and a rack held on said bed in mesh with said pinion, said rack being adapted tobe held stationary during part of the stroke of the bed, substantially as shown and described.

at. A stone-dressing machine, comprising a reciprocating bed, a transversely and vertically adjustable tool-carrier, spindles mounted on bearings supported on said bed for can rying a stone, a feed mechanism for turning said stone intermittently, said feed mechanism eomprising a worm-Wheel secured on one of the spindles, a worm in mesh with said worm-Wheel, a pinion. held loosely on a wormshaft, a pawl-and-ratehet mechanism for connecting said pinion to said wormshaft, a rack held on said bed in mesh with said pin ion, said rack being adapted to be held stationary, and a fixed stop adapted to be engaged by said rack during part of the reciprocating movement of the bed, to hold said rack stationary, substantially as shown and described.

JAMES M. MALONE. JAMES D. PERKINS.

"Witnesses: 1

E. D. HAROHUFF, Ronr. O. HAMMETT. 

